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    <title>Document</title>
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<body>
    <!-- 2 写一个div 有宽度和高度 -->
    <div id="main" style="height: 400px; width: 600px"></div>

    <!-- 1 引入echart -->
    <script src="../assets/lib/echarts/echarts.min.js"></script>

    <!-- 3 script 做初始化 -->
    <script>
        // 基于准备好的dom，初始化echarts实例
        const myChart = echarts.init(document.querySelector("#main"));

        // 指定图表的配置项和数据
        const option = {
            tooltip: {
                trigger: "axis",
                axisPointer: {
                    type: "cross",
                    crossStyle: {
                        color: "#999",
                    },
                },
            },

            legend: {
                data: ["Evaporation", "Precipitation", "Temperature"],
            },
            xAxis: [
                {
                    type: "category",
                    data: ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"],
                    axisPointer: {
                        type: "shadow",
                    },
                },
            ],
            yAxis: [
                // 设置 两个y坐标轴
                {
                    type: "value",
                    name: "Precipitation",
                    min: 0,
                    max: 250,
                    interval: 50,
                    axisLabel: {
                        formatter: "{value} ml",
                    },
                },
                {
                    type: "value",
                    name: "Temperature",
                    min: 0,
                    max: 25,
                    interval: 5,
                    axisLabel: {
                        formatter: "{value} °C",
                    },
                },
            ],
            series: [
                // 每一个对象 ，代表着 每一组数据 蓝色  绿色  折线图-黄色
                {
                    name: "Evaporation",
                    type: "bar",
                    tooltip: {
                        valueFormatter: function (value) {
                            return value + " ml";
                        },
                    },
                    data: [
                        2.0, 4.9, 7.0, 23.2, 25.6, 76.7, 135.6, 162.2, 32.6, 20.0, 6.4,
                        3.3,
                    ],
                },
                {
                    name: "Precipitation",
                    type: "bar",
                    tooltip: {
                        valueFormatter: function (value) {
                            return value + " ml";
                        },
                    },
                    data: [
                        102.6, 5.9, 9.0, 26.4, 28.7, 70.7, 175.6, 182.2, 48.7, 18.8, 6.0,
                        2.3,
                    ],
                },
                {
                    name: "Temperature",
                    type: "line",
                    // 设置折线图 和 第二个坐标轴向对应！
                    yAxisIndex: 0,
                    tooltip: {
                        valueFormatter: function (value) {
                            return value + " °C";
                        },
                    },
                    data: [
                        2.0, 2.2, 3.3, 4.5, 6.3, 10.2, 20.3, 23.4, 23.0, 16.5, 12.0, 6.2,
                    ],
                },
            ],
        };
        // 使用刚指定的配置项和数据显示图表。
        myChart.setOption(option);
    </script>
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